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ADuM5401/ADuM5402/ADuM5403/ADuM5404
V DD1 1
GND 1 2
16 V ISO
15 GND ISO
Data Sheet
V OA 3
V OB 4
ADuM5404
TOP VIEW
14 V IA
13 V IB
V OC 5
V OD 6
RC OUT 7
(Not to Scale) 12 V IC
11 V ID
10 V SEL
GND 1 8
9
GND ISO
Figure 10. ADuM5404 Pin Configuration
Table 24. ADuM5404 Pin Function Descriptions
Pin No.
1
2, 8
3
4
5
6
7
9, 15
10
11
12
13
14
16
Mnemonic
V DD1
GND 1
V OA
V OB
V OC
V OD
RC OUT
GND ISO
V SEL
V ID
V IC
V IB
V IA
V ISO
Description
Primary Supply Voltage, 3.0 V to 5.5 V.
Ground 1. Ground reference for isolator primary. Pin 2 and Pin 8 are internally connected, and it is recommended
that both pins be connected to a common ground.
Logic Output A.
Logic Output B.
Logic Output C.
Logic Output D.
Regulation Control Output. This pin is connected to the RC IN pin of a slave iso Power device to allow the ADuM5404
to control the regulation of the slave device.
Ground Reference for Isolator Side 2. Pin 9 and Pin 15 are internally connected, and it is recommended that both
pins be connected to a common ground.
Output Voltage Selection. When V SEL = V ISO , the V ISO setpoint is 5.0 V. When V SEL = GND ISO , the V ISO setpoint is 3.3 V.
Logic Input D.
Logic Input C.
Logic Input B.
Logic Input A.
Secondary Supply Voltage Output for External Loads, 3.3 V (V SEL Low) or 5.0 V (V SEL High).
TRUTH TABLE
Table 25. T ruth Table (Positive Logic)
V SEL 1
H
L
L
H
RC OUT 2
PWM
PWM
PWM
PWM
V DD1 (V)
5
5
3.3
3.3
V ISO (V)
5
3.3
3.3
5
Notes
Master mode, normal operation
Master mode, normal operation
Master mode, normal operation
This supply configuration is not recommended due to extremely poor efficiency
1
2
H refers to a high logic, and L refers to a low logic.
PWM refers to the regulation control signal. This signal is derived from the secondary side regulator and can be used to control other iso Power devices.
Rev. C | Page 16 of 28
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